3 ms·
You can broadcast FM radio over short distances by doing PWM over GPIO pins, so that does not suprise me! I used this for switching radio controlled power outl
by erinaceousjones 2y ago
You can broadcast FM radio over short distances by doing PWM over GPIO pins, so that does not suprise me!
I used this for switching radio controlled power outlets which had 433mhz receivers. [2]
[1] https://github.com/markondej/fm_transmitter?tab=readme-ov-file https://github.com/markondej/fm_transmitter?tab=readme-ov-fi...
[2] https://github.com/F5OEO/rpitx https://github.com/F5OEO/rpitx
- Terr_ 2y agoThere's also a recent "RAMBO" paper about using code to control how memory is accessed so that standard DRAM chips/circuitry will emit decode-able radio signals, at least enough to extract private keys from otherwise air-gapped computers.